Geokimia Batugamping Formasi Gumai dan Formasi Baturaja di Wilayah Muaradua, Ogan Komring Ulu Selatan, Provinsi Sumatera Selatan
DOI:
https://doi.org/10.33332/jgsm.geologi.v17i3.11Abstract
Formasi Gumai dan Formasi Baturaja merupakan dua dari beberapa satuan batuan yang terdiri dari batugamping di daerah Muaradua, Ogan Komring Ulu, Provinsi Sumatera Selatan. Komposisi geokimia merupakan sisi yang dibahas dalam penelitian ini pada kelompok batugamping dari Formasi Gumai dan Formasi Baturaja. Kadar oksida utama pada contoh diketahui menggunakan perangkat XRF, sedangkan unsur jarang dan unsur tanah jarang dengan ICP-MS. Bivariate plots, koefisien determinasi, dan pearson correlation coefficient dimanfaatkan untuk membedakan batugamping dari kedua unit batuan ini. Rataan unsur tanah jarang pada batugamping Formasi Baturaja (89,79 ppm) jauh lebih tinggi dari contoh yang sama dari Formasi Gumai (33,63 ppm). Melalui studi ini dapat disimpulkan bahwa kedua kelompok batugamping memiliki proses pembentukan berbeda. Formasi Baturaja lebih banyak dipengaruhi oleh bahan klastik dengan mengacu pada komposisi Al2O3, Fe2O3T, dan Er/Nd. Kondisi lingkungan lebih oksidatif pada batugamping Formasi Baturaja dikonfirmasi oleh anomali Ce. Pengaruh material terrigenous pada Formasi Baturaja dan Formasi Gumai dapat disimpulkan melalui perbandingan Y/Ho.Downloads
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